It appears that slapd is hitting some issues in this code still, even though
the other symptoms in that bug report are marked as fixed. LD_PRELOADing a 3rd
party malloc library shows no issues and likewise valgrind finds no invalid
memory accesses in our code. I was seeing crashes on x86_64; the 32 bit code
may actually be fixed by now.

Just an fyi. I've already spent more than 2 weeks looking for a memory
overwrite in slapd only to find that the malloc library is broken. I can't
afford to spend any more time tracking this down.